Electrical transformer



(No Mode1.)`

F. H. JEANNIN.

ELECTRICAL TRANSFORMBR.

No. 579,395. Patented Mar.Z3,1897.

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UNiTEn STeTEs PATENT @Erica FRANK IIARDIE JEriNNlN, F riRth/ilf)IA, FLOl'lDi/t..

ELECTRCAL imi:

SPECIFCATIN forming part of Letters Patent No. 579,395,

dated March 23, 189'?.

Application filed April l, 1895. Renewed February l5, 1897. Serial No. 623,580. (No model.)

To UZ whom, t may concern:

Be it known that I, FRANK Hannin JEAN- NIN, of the city of `Arcadia, De Soto county, State of Florida, have invented certain new and useful improvements in rfransformers, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part hereof.

My invention relates to an im proved transformer; and it consists in the novel construction, combination, and arrangement of parts hereinafter described and claimed.

ln the drawings, Figure l is a side elevation of my improved transformer, the same being located in a suitable casing, a portion of said casing being broken away. Fig. 2 is a Vertical sectional view of my improved transformer after the same has been properly wound and before the ends are lapped over and properly7 fastened. Fig. 3 is an enlarged horizontal sectional view taken approximately on the indicated line 3 3 of Fig. f2. Fig. -lE is a vertical sectional view of the upper portion of one of the improved transformers after the same has been properly wound and iinished.

Referring by numerals to the accompanying drawings, l indicates a suitable casing that may be of any size and form desired, said casing being constructed with perforated ears 2, whereby it is fastened at any suitable point. Said casing l is provided with the top plate 3, that is fastened to said casing by screws, bolts, or in any suitable manner.

t indicates a bundle of soft-iron wires cut in uniform lengths, and said bundle of softiron wires comprises the core of myim proved transformer.

5 indicates the secondary coil, which. is preferably of copper wire and the ends C of which are so arranged as that connections can easily be made thereto.

7 indicates a series of soft-iron wires that are cut at different lengths, and S the primary coil, which is preferably of copper wire, its ends being so arranged as that connections can be easily made thereto. Suitable insulating material is indicated by heavy black lines in the drawings.

In winding er constructing a transformer of my improved form a bundle of soft-iron wires, such as et, of the desired length are covered with suitable insulation. rllhe secondary coil, preferably of copper wire properly insulated, is now wound directly upon this bundle of soft-iron wires, and the ends G thereof are left projecting some distance from the outside ends of the bundle of iron wires which constitute the core of the transformer. .d layer of soft-iron wires such as 7, are now located directly upon the secondary coil, said layer of wires lying parallel with the cere composed of the iron wires i and the ends of said wires 7 projecting a slight distance beyond the ends of said core. Said layer of iron wires are new properly insulated and a single layer of the primary coil S is new wound over this first layer of iron wires 7, said iirst layer extending the entire length of the core d. d second layer of iron wires 7 are now laid upon the nrst layer of the primary coil, said second layer of iron wires 7 being properly insulated. A second layer of the primary coil is now wound upon this second layer of iron wires 7, and this method of winding or alternating the longitudinally-extending iron wires 7 with the layers ef the primary coil is continued until the transformer is of the proper size.

lt is essential that the ends of all the wires 7 protrude some distance from the ends of the core i, llfhen the transformer is of thc proper size, a part of these ends are lapped over toward the center of the core i, as indicated by A in Fig. d. The remaining ends or the ends of the outside layers of the iron wires are lapped over the outside of the last coil of the primary wire te meet approximately at the center of the transformer, as indicated byl, Fig. The transformer thus completed is located in a casing, such as l, and the ends of the primary and secondary coils brought through suitable apertures in said casing and the proper connections made thereto.

A transformer of the construction hereinbefore described is very compact and is very easily and expeditiously constructed.

The longitudinally-extending wires 7, as may be plainly seen, constitute a portion of the core, and by so locating them between the copper-wire coils transformer is con` strncted that possesses superior' advantages IOO across the cud of said core, and the others B being bent outward and lapped over cach other, and tu exterior casing for holding,` in position such lapped-over portions, substfur tiztily its herein Specied.

in testimony Whcrco'll l affix my signature in presence ol two witnesses.

FRANK HARDTE JEANNI'N.

lVitncsscs:

C. C. Mol-mexx, B. F. BALDWIN. 

